Lubricating apparatus for engines.



No. 763,719. PATENTED JUNE 28, 1904, E. DE H. CALDWELL.A LUBRIG-ATING APPARATUS FUR ENGINES.

APPLICATION FILED DEC.5,103. No mm1..

.lwe 11151 I f wg y, EM mmw QZ/ no, ecarte.

Unirse Sterns annua nn narran catnwnnn or essere, learners, assienon or oldnrnnr @lenient HALF T JOHN WILSN, 0F GENEVA, lLLlNOlS.

BEQIFKATIQN fog part of Letters Patent Ho. 763,719, dated June S8, l.

Appleman ne@ December 5,1903'. sain No. 133.900. un man.)

ticnlary to provide an improved lubricator for the cross-heads of engines; and the invention consists in the featuresof improvement hereinafter described, illustrated in the accompanying (ii-swings, and particularlyv pointout in the claims at the end of this specification;

Figure 1 is a view in elevation of an engine hnving my invention applied thereto. Fig. d is en enlarged detail View, in vertical longitudinal section, ofthe lubricating apparatus embodying my invention.

of thel engine-frame.

'My invention is shown as applied to a stationaryengine of the simple expansion type, although manifestly it is susceptible of application in a Varietyv of other situations. The frame A ot the engine is provided with usual i guides B, in which travels the cross-head C,

that is connected by a wrist-pin d' with aconnecting-rodh), .which leads to thecrankF of the engine.

My improved lubricator in the preferred form of the invention comprises a cylinder G, that is conveniently attached to some part Preferably the cylinder G has cast in piece therewith or attached thereto an arm or bracket g, that isprovided with one or more slots g', through which will pass bolts Tg2, that'will enter threaded holes tapped in the engine-frame. The slots g will be sufliciently long and preferably, also, of considerably-greater width than the diameter of thebolts g2 to permit of the adjustment of the cylinder to the required position upon the engine-frame, it being understood that the heads of thebolts g2 or washers carried thereby will be larger than the slots g. The cylinder G is connected at `one end by a pipe i with an oil cup or reservoir H, this oil cup or reservoir being of any suitable type-such,

for example, as the ordinary sight-feed cup.

Preferably the rear end of the cylinder G is fitted with a diaphragm G', forming a small chamber G2 at the rear end of the cylinder in which a certain head of oil may acurnulate. The diaphragm G is fitted with a suitable valve, and preferably this valve consists of a disk z' at the end of a' stem I, that l passes through the'ho'le in the diaphragm G', through which the oil escapes from the chamber G2 to the cylinder. l passes through a hub at the back end of the cylinder G and is encircled by acoiled spring J, the outer end of which bears against a head j', carried by the stem i., This coiled spring ,l lthus serves to hold the Valve e' normally closed, so'as to preventthe liow of oil through the diaphragm G.' Preferably a cap K incloses the spring J, the threaded inner end of thiscap engaging corresponding threads upon the hub or boss g4 at the rearend of the cylinder Gr. lt is obvious that any other suitable form of checked valve mechanism may be used between the body of the cylinder and The rear end ofthe stem lk the oil cup or reservoir, although 1 prefer the' arrangement described, as |the provision of the supplemental chamber G2 insures'the head of oil in readiness to 'be delivered tothe in-- terior of the cylinder Gf.

Within the cylinder Gis mounted in manner free to slide a piston L, that is -carried at the inner end of a tubular piston-rod'M, the

bore mfof this piston-rod opening through the inner face ofthe piston L and affording a channel for the passage of oil from the interior of the cylinderG. A A snug t of the pistou L with the interior of the cylinder G may be insured by a cup-leather L' or in any other suitable manner, The piston-rod M, passes through the outerv end or head G3 of the cylinder G, this head being preferably connected by ianges to the cylinder, as shown. Around the piston-rod M sets a coiled spring M', one end of which bears against the head G3 of the cylinder, while its'opposite end bears against the head Noi the piston-rod M, through which `head N a passage m ofthe piston-rod` extends.

Preferably the outerl face ofthe piston-rod head N istted-with a4 perforated leather disk n, that may be conveniently held in place by a steel ring "nf,- secured Lto the Aouter false of the piston-rod head1.

Opposite the piston-rod head the plunger P, from which a. tubular stem orpipe p extends to the cross-head B or other moving part of the engine to be lubricated. TheA stem p ofv theplunger P may be attached to the cross-head at any convenient point and in any suitable manner, and-it will be understood that from the inner end'of the stem or pipe p suitable channels willleadthrough the wrist-pinto the guides or other parts-to be lubricated. l Preferably the outer face of the plunger Pis provided with a circular ,odset 'or raised portion p', adapted to' enter within the ring n' of the piston-rod head N and bear firmly against'the leather disk on 'the outer face of the piston-rod head. .in the preferred form of the invention the piston-rod head N is provided with a ball-valve R, (or other suitl able check-valve,) held normally against im seat r by a light spring 7", the opposite end of this spring` bearing against a ring r2, and preferably alsola similar `check-valve S is provided in the plunger Por4 in the pipe leading therefrom to the cross-head.

From the foregoing description the operation of my improved lubricating apparatus will be seen to be as follows: As the crossheadB reciprocates, the plungerP will Contact lwith the piston-rod head N, making a tight joint therewith and forcing the piston-rod head, the piston-rod, and the piston inward against the spring M. As the piston-L is thus forced inward, the oil within the body of the cylinder Gr will be caused to iow through the channel m of the piston-rod and, unseating the valves Rand S, will pass through the piston-rod head N, the plunger P, and the stem or pipe p to the cross-head of the engine. As the engine cross-head moves in opposite direction, carrying with it the plunger P, the spring M forces outward the piston-rod head N and the piston'L, and this outward movement of the piston L causes the valve z' to be nnseated, thereby permitting-oil to flow from the supplemental chamber G2 into the interior of the cylinder G and permitting the ballvalves R and S to be returned by their springs to their respective seats. It will thus be seen that at each stroke of the cross-heada quantity of oil will beA delivered thereto. It will be understood that the piston-rod M ts sufi iciently loosely within the head G3 of the cylinder to prevent the formation of an air suc- Vtion at the outer end of the cylindenor, if desired, the cylinder-head G3 may be formed with a vent-hole for such purpose.

My improved lubricating apparatus' presents many advantages over devices heretofore employed. The oil is delivered to the cross-head under pressure and a predeter- N is mounted mined quantity of oil is delivered at each stroke of the cross-head, so that waste of the oil is avoided. Inasmueh as theI piston L draws or sucks the oil into the cylinder G, it

is manifest that the kreservoir or supply for oil maybe set at any desired level either above or below the cylinder G. The slight pressure of air caused by the entrance of the offset portion of the plunger P into the ring n on the outer face of the piston-rod head serves to unseat the valves R and' S, so that the passageway from the cylinder to the cross-head is open for the injection of the oil as the pistonrod head andpiston are forced inward.

So far as I am aware my present invention presents the'rst instance of a lubricating apparatus in which there is combined a receptacle for oil, a movable head or member, the

shift oflwhich is adapted to force oil from said receptacle and though said head, and a plunger adaptedtoshift said movable head or member and provided with a channel or passage for leading' the oil from the plunger toward .the part to be lubricated, and I 'wish the invention, as hereinafter claimed, to be'understood as covering, broadly, such a lubricating apparatus without' regard to the details of structure-employed in its practical embodiment, since manifestly such details of structure may be varied within wide limits without departing from the spiritof the invention.' Having thus described my invention, what I claim as new, and desire to secure'by Letters Patent, is-

l. A lubricatingr apparatus comprising areceptacle for oil, a movable head or member provided with means for forcing oil from said receptacle and having an opening through. which the oil is forced, a plunger separate from said movable head or member and connected to a movable part of the engine and arranged in position to shift said movable head or member, a tube connected to and movable with said plunger for conducting the oil from said plunger and means for restoring said head or member to normal position as the plunger recedes therefrom.

2. A' lubricating .apparatus comprising a cylinder for containing oil, a' piston within said cylinder, a tubular rod connected to said piston and provided with an open head .or end -through which oil will bedischarged, a plunger adapted to be connected to a movable part of the engine and having an opening through it for the passage of oil from said tubular rod, and a tube for conducting the oil so received to the point to be lubricated.

3. A lubricating apparatus comprising a receptacle for oil, a piston Within said receptacle, atubular rod leading outward from said piston and provided with an open head or end, a tube adapted to be connected to a movable part of the engine` and provided with a head or end arranged in position to contact with the head or end of said tubular rod and to receive veavie -oil to the part to be lubricated, 7said pipeand said tube being provided at their opposing free ends with parts Aadapted to form a tight joint to permit oil tol pass fromjsaid pipe to said tube.` y

5. A lubricating apparatus comprising an oil-receptacle, a piston within saidoil-receptacle having a tubular stem or rod through which o'il will be forced, in combination with a plunger connected to a movable part of the engine, a tube leading from said plunger and movable therewithl for conducting thel oil therefrom, the outer end of said piston-stem being locatedl in the path of travel of said plunger and adapted to be shifted thereby to cause the oil tobe forced from said receptacle.

6. A lubricating apparatus comprising a cylinder, means for delivering oil to said vcylinder and means for forcing oil from said cylinder comprising a piston, atubular rod leadingfrom said piston and provided with a perorated head, a spring lfonmoving said rod and piston in one direction, a plunger connected to a movable part of the engine and arranged to shift said head and piston in the opposite direction, and a tube for conducting the oil from said perforated plunger.

7. A lubricating apparatus comprising la cylinder provided at one end with a supplemental chamber, means lfor delivering oil to. said supplemental chamber, a valve for controlling the iiow of oil'from said Supplemental chamber to said cylinder and means for forcing oil from said cylinder comprising apiston, a movable headl or member connected to said piston and provided with a passage through which oilpasses from said cylinder, a plunger connected to a movable part oi' the engine and arranged in position to shift said movable head or member, a tube for conducting the oil from said plunger, and means for restoring lsaid movable head or member and said piston to normal position as the plunger recedes therefrom.

8. A lubricating apparatus comprising a receptacle for oil, a movable head or member provided With means for forcing oil from said receptacle, said `head or member having an Aopening therein through which the oil is forced, va' plunger connected to a movable part of the engine and arranged in position to shift said movable head or member, said head or lmember -and said plunger being formed, one, with an annular raised rim, and the other with a projecting part adapted to enter said annular raised rim. a tube for conducting the oilfrom said plunger and means for restoring saidmovablehead or member to able part of the engine'and arranged in position to shift said movable head or member,

and a tube for conducting the oil from said plunger.

EDWIN DE HAVEN CALDWELL.

Witnesses:

` Geo. P. FISHER, J r., ALBERTA ADAMICK. 

